{"id":27876,"date":"2018-03-09T09:20:20","date_gmt":"2018-03-09T09:20:20","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/evaluacion-de-la-utilidad-de-las-tecnicas-de-espectroscopa%c2%ada-y-perfusion-cerebral-por-resonancia-magnetica-en-la-caracterizacion-de-los-astrocitomas-difusos-infiltrantes\/"},"modified":"2018-03-09T09:20:20","modified_gmt":"2018-03-09T09:20:20","slug":"evaluacion-de-la-utilidad-de-las-tecnicas-de-espectroscopa%c2%ada-y-perfusion-cerebral-por-resonancia-magnetica-en-la-caracterizacion-de-los-astrocitomas-difusos-infiltrantes","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/evaluacion-de-la-utilidad-de-las-tecnicas-de-espectroscopa%c2%ada-y-perfusion-cerebral-por-resonancia-magnetica-en-la-caracterizacion-de-los-astrocitomas-difusos-infiltrantes\/","title":{"rendered":"Evaluaci\u00f3n de la utilidad de las t\u00e9cnicas de espectroscop\u00eday perfusi\u00f3n cerebral por resonancia magn\u00e9tica en la caracterizaci\u00f3n de los astrocitomas difusos infiltrantes"},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Mendez Cendon Jos\u00e9 Carlos <\/strong><\/h2>\n<p>Hipotesis  la hip\u00f3tesis del presente trabajo de tesis doctoral fue que, mediante los estudios de espectroscop\u00eda y perfusi\u00f3n cerebral por rm, puede determinarse de forma prequir\u00fargica el grado de malignidad tumoral en los astrocitomas difusos infiltrantes con una sensibilidad y especificidad superiores a la rm convencional, a base a determinadas diferencias de composici\u00f3n metab\u00f3lica y de microvascularizaci\u00f3n susceptibles de evaluarse mediante estas t\u00e9cnicas.  objetivo  el objetivo de este trabajo fue tratar de verificar la hip\u00f3tesis planteada, estudiando una muestra de pacientes con astrocitomas difusos infiltrantes mediante t\u00e9cnicas de espectroscop\u00eda y perfusi\u00f3n por rm, y realizando una correlaci\u00f3n de los resultados obtenidos con el grado de malignidad determinado mediante el estudio anatomopatol\u00f3gico.  material y m\u00e9todos  se analizan retrospectivametne los hallazgos en rm convencional y los par\u00e1metros funcionales obtenidos mediante espectroscop\u00eda y perfusi\u00f3n por rm en 65 pacientes con astrocitomas difusos infiltrantes de los tres grados de malignidad diagnosticados histol\u00f3gicamente. En la rm convencional se analizan los signos cl\u00e1sicos considerados como sugestivos de alto grado de malignidad (refuerzo, cavitaci\u00f3n, heterogeneidad en t2, vac\u00edo de se\u00f1al, definici\u00f3n de los l\u00edmites, edema y efecto de masa). En espectroscop\u00eda se analizan los \u00edndices metab\u00f3licos de los espectros tumorales (naa\/cr, cho\/cr, naa\/cho, l\u00edp\/cr, lac\/cr y mi\/cr) y de los espectros tumorales respecto al par\u00e9nquima sano (%naa, %cho, %cr, %mi), en la perfusi\u00f3n por rm se analiza el valor de volumen sangu\u00edneo cerebral relativo (vscr).  resultados  existieron diferencias significativas (p menor 0,05) de los valores de naa\/cr, %naa, cho\/cr, %cho, naa\/cho, mi\/cr, %mi, l\u00edp\/cr y vscr entre los tres  grados de malignidad. Ocho de los diez \u00edndices de espectroscop\u00eda (%mi, l\u00edp\/cr, vscr, mi\/cr, naa\/cho, cho\/cr, naa\/cr%naa) y el valor de v<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Evaluaci\u00f3n de la utilidad de las t\u00e9cnicas de espectroscop\u00eday perfusi\u00f3n cerebral por resonancia magn\u00e9tica en la caracterizaci\u00f3n de los astrocitomas difusos infiltrantes<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Evaluaci\u00f3n de la utilidad de las t\u00e9cnicas de espectroscop\u00eday perfusi\u00f3n cerebral por resonancia magn\u00e9tica en la caracterizaci\u00f3n de los astrocitomas difusos infiltrantes <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Mendez Cendon Jos\u00e9 Carlos <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 18\/12\/2003<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Jes\u00fas Vaquero Crespo<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Jos\u00e9 Antonio Rodr\u00edguez montes <\/li>\n<li> Cruz diaz m. angeles (vocal)<\/li>\n<li>Luis Ramos gonz\u00e1lez (vocal)<\/li>\n<li>ramiro Diez lobato (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Mendez Cendon Jos\u00e9 Carlos Hipotesis la hip\u00f3tesis del presente trabajo de tesis doctoral fue que, mediante los 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